Most impressive, Manuel :)
I've had a brief peek at the code - don't understand it yet, but here's a
couple of things...
BPL DontSwap ; Y: All right!
BPL DontSwap ; Y: All right!
You have a duplicate line in Flickersort
; Two lines *wasted* with repositioning...
DEC vline
DEC vline
Consider instead
dey
dey
sty vline
The latter takes 7 cycles. Your current version takes 10 cycles.
Same # bytes, of course.
Anyway, an interesting kernal. Keep up the good work!
Cheers
A
----- Original Message -----
From: "Manuel Polik" <cybergoth@xxxxxxxx>
To: <stella@xxxxxxxxxxx>
Sent: Thursday, August 01, 2002 9:31 AM
Subject: [stella] Star Fire 2600: Star Background
> Hi there!
>
> Ok, as promised, here's finally a binary with some star
> background, using an adopted technique which I analysed
> by studying the code from Earth Dies Screaming.
>
> Please ignore the increasing stars flicker towards the
> right edge of the screen, I'll *time* most of that away,
> as soon as I'm done with adding features to the kernel.
> Unlike my first assumption, flicker can't be totally
> avoided, since there's no way to enable the ball during
> a repositioning line.
>
> I've still a few cycles left (~6 on each line, + one STA
> WSYNC eventually) so I'm positive at the moment about
> having non-mirrored sprites, which'd allow me adding the
> mothership in its original fashion.
>
> Greetings,
> Manuel
>
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